On Thu, 2 Aug 2001, Ned Seith wrote:

>
> Vasile,
>
> A triac will turn off or interrupt DC current, if the DC current is pulsed
> energy and decreases in amplitude to near zero volts.

  Do I said something else ? If the current flowing from A to K is less
than sustaining current then will shut off. This current may be near zero
or greatest, depends on device. Power devices have greatest sustaining
current. GTO are better for DC usage, they haven't this ill, but are
difficult to command.
  Cheers to you, too !
  Vasile


>
> At 09:22 AM 8/2/01 +0300, you wrote:
> >It seems you don't know how a thyristor or a triac works.
> >If you supply A-K ( thyristor ) or A1-A2 ( triac ) ( A = anode, K =
> >cathode ) in DC the AK or A1-A2 junction will stay on after a gate or opto
> >command until the currrent through this junction will go to zero ( in fact
> >must be less than sustain current) and this will never hapened in DC .
> >Use a bulb for test and supply it in AC. Will works.
> >Cheers, Vasile
> >
> >
> >On Thu, 2 Aug 2001, Nick Veys wrote:
> >
> > > Hi all, I'm using an Omron G3MB-202P solid state relay, 5V flavor.  It's
> > > a phototriac.  It's not behaving how I would expect though, hopefully
> > > someone can clear this up..
> > >
> > > Pin definitions:
> > >
> > > 1 - load
> > > 2 - load
> > > 3 - (+) input
> > > 4 - (-) input
> > >
> > > Here's what I am seeing:
> > >
> > > Connections:  to test this I just want to light an LED...
> > >
> > > 5V to Anode of 5V LED
> > > pin 1 - cathode of LED
> > > pin 2 - ground
> > > pin 3 - ground
> > > pin 4 - ground
> > >
> > > This is how I start it up.
> > >
> > > Now when I apply power to this, of course nothing happens as I expect.
> > > I then switch over the pin 3 to +5V, the LED lights, as expected, I then
> > > switch the pin 3 back to ground, the led stays lit.  In fact, no
> > > arrangement of the input pins (3,4) will make the damn LED shut off, I
> > > can't break the circuit once it's made...  Doesn't sound too useful of a
> > > relay!
> > >
> > > Hopefully I'm doing something obviously wrong!!
> > >
> > > I've tried this with 3 different relays so I doubt they are defective...
> > >
> > > Someone please smack me and tell me the simple solution! :)
> > >
> > > Thanks all!
> > >
> > > -- Nick
> > >
> > > nick@veys.com | www.veys.com/nick
> > >
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> > >
> >
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